Technical description and composition of the MYSTERY MTV-2204W TV, panel type and applicable modules. The composition of the modules.MYSTERY
Model: MTV-2204W
Panel: 22 inch
MainBoard: GH-TS26KU-S1
IC MainBoard: TSUMV36KE-LF percent AT25F40-100GPC - flash, 24C32 - eprom
Tuner: TDQ-3EQ2
Technical Specifications MTV-2204W
MYSTERY MTV-2204W
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the MYSTERY MTV-2204W TV with a careful external examination of internal and external elements, including case parts, a display, buttons and cables. Visible damage to elements can sometimes suggest further directions for finding a defect before starting the necessary measurements. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a hint in the assumptions about the causes and consequences of the malfunction.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain probability that the power module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, but this happens much less often. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and, in the event of an open circuit, the reason should be sought in the power semiconductor elements of the pulsed flyback converter of the main PSU. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the converter, which can be installed separately on the radiator, or integrated with a PWM controller.
It should be borne in mind that in the repair practice it is extremely rare that key transistors of the N-FET type fail for no reason that should be looked for by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, either dried electrolytic capacitors or dangling resistors of the primary circuit of the PSU, involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
If the MYSTERY MTV-2204W does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Repairing the inverter is difficult because in case of any malfunction or emergency, even with uneven wear of the lamps, a protection is triggered, which turns it off for fire safety. Diagnostics become impossible and protection needs to be disabled.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
Repair of the motherboard GH-TS26KU-S1 must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. In some cases, they require checking or replacing (if necessary) the elements of the MB board (SSB) - TSUMV36KE-LF percent. AT25F40-100GPC - flash, 24C32 - eprom, TDQ-3EQ2 - tuner.
It should be remembered! Attempts to repair the MYSTERY MTV-2204W TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> MYSTERY MTV-2204W Chassis GH-TS26KU-S1
The appearance of the MainBoard MSTV2408-ZC01-01 is shown in the figure below:MSTV2408-ZC01-01
MSTV2408-ZC01-01 can be used in TVs:
MYSTERY MTV-1907W (Panel CLAA185WA09(FE58ZKMJ00)), MYSTERY MTV-2207W (Panel CLAA215FA05).
Main features of the MYSTERY MTV-2204W device:
Installed matrix (LCD-panel) 22 inches.
The required supply voltage for all nodes of the TV MYSTERY MTV-2204W provides a switching power supply.
MainBoard - the main board (motherboard) is a GH-TS26KU-S1 module, using TSUMV36KE-LF percent microcircuits. AT25F40-100GPC - flash, 24C32 - eprom and others.
The TDQ-3EQ2 tuner provides TV reception and channel tuning.